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(x%2)×5%3=12解方程

(1)60%X+25=40, 60%X+25-25=40-25, 60%x=15, 60%x÷60%=15÷60%, x=25;(2)X+12.5%X=72, 1.125x=72,1.125x÷1.125=72÷1.125, x=64;(3)75%X- 1 16 =0.5X,75%X- 1 16 + 1 16 =0.5X + 1 16 ,75%x-0.5x=0.5x + 1 16 -0.5x,0.25x= 1 1...

5/8x=2/3 x=5/12

(1)49×1516÷56=512÷56=12;(2)12:15=14:x 12x=15×14 12x÷12=120÷12 x=110;(3)1920+0.25+5%+34=(1920+5%)+(0.25+34)=1+1=2;(4)1112x-x120%=65 112x=65 112x÷112=65÷112 x=780.

(1)X- 2 5 X=18, 3 5 X=18, 3 5 X ÷ 3 5 =18 ÷ 3 5 ,X=30; (2)X-10%X=27, 90%X=27, 0.9X=27, 0.9X÷0.9=27÷0.9, X=30;(3)62.5%X+ 1 8 = 3 4 , 62.5%X+ 1 8 - 1 8 = 3 4 - 1 8 , 62.5%X= 5 8 , 0.625X= 5 8 ,0.625X÷0.625= 5 ...

y轴上x=0 x轴下方则y

37.5%x-16分之3x=8分之3 16分之3x=8分之3 x=8分之3÷16分之3 x=2

① 20%x=0.7-0.5 0.2x=0.2 x=1 ②0.95x=95 x=100 ③70%x=10 x=10÷0.7 x=100/7 ④ 32%x=40 x=40÷0.32 x=125

(4分之1-12.5%)x=10 即 (1/4-1/8)x=10 得 x=80 5分之4x-8分之3=8分之5 即 4/5x-3/8=5/8 得 x=5/4 5分之3:x=3分之1:2 即 3/5×2=1/3x 得 x=18/5 0.4:3.5=1.6:x 即 0.4x=3.5×1.6 得 x=14 3+0.8x=45 x=105/2

n= [(n-1)+100]x5%

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